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App 2.6.0: floating button to open the app

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The MG4's launcher does not list third-party apps, so the app could
only be opened by reinstalling it. Now a small round MG-red button
floats over the car's screens: tap opens the app, drag moves it (the
position is kept and clamped to the screen), and it hides while the
app itself is open. A switch in the Upload tab turns it off.

The always-on service owns the overlay, so the button is there from
boot. It needs the overlay permission (SYSTEM_ALERT_WINDOW), which the
car build has through the system UID; without it, or if the window
manager refuses, the button stays away and nothing crashes, and the
Upload tab offers the system permission screen.

Tested on an Android 9 AOSP emulator at the head unit's 1920x1080 /
160 dpi with the car APK (installs as UID 1000): button appears over
the home screen, tap opens the app, hidden while open, drag moves it
without opening the app, position survives a force-stop, the switch
works through the UI. FloatingButtonGeometry has 3 unit tests.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki
This commit is contained in:
nils
2026-10-17 22:55:15 +02:00
co-authored by Claude Opus 5.5
parent a53ea589b2
commit 11d53e7bc7
12 changed files with 362 additions and 3 deletions
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SPECS.md
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@@ -114,6 +114,11 @@ tyre pressures, GPS (lat, lon, elevation, heading) and the is_* flags. It does *
INGEST_TOKEN) into git and pushed it. Commit amended and force-pushed; both values regenerated in
the now gitignored `k8s/secrets.yaml` (since moved to `k8s/secrets/secrets.yaml`, outside
`kubectl apply -f k8s/`). Filled-in secrets live only there from now on.
- 2026-10-17 — App 2.6.0: floating button to open the app, because the MG4 launcher does not list
it. Drawn over other apps (needs the overlay permission, which the car build has through the
system UID), draggable, hidden while the app is open, switch in the Upload tab. Tested on an
Android 9 AOSP emulator at 1920x1080/160 dpi with the car APK (installs as UID 1000 there too).
- 2026-10-17 — App 2.5.0: range estimates at current and 5-minute average power (Vehicle tab).
- 2026-10-17 — Live dashboard reworked around the signals the car sends: Climate setpoint, Last
update and a computed Energy in pack replace the empty temperature tiles; Battery voltage and
current replaces the Temperatures chart.